to use the lan server feature, you just select the game you want to host for in the dropdown (waw, bo2, mw3)
then create a config for the server, either using the simple config generator or manually making one and placing it in the correct folder
you can also select any mods to use on the server by going to the mods tab and selecting one before launching the server (must be for the same game as the server)
you can also put in a custom port for the server with the port input box, and then host the server
the gui should show your local ip, which is used with the /connect command to join the server (if the local ip is incorrect then that may be an issue i need to look into)
